Locking means for adjustable brake heads



Much' 10. 1925. 1,529,400

E. G. BUSSE ET AL LOCKING HE'ANS FOR' ADJUSTABLE BRAKE HEADS Filed July- 3- 1924 2 Sheets-Sheet 1 153226225520127 fflwaz Q. mae jid/Way 6. /Zmuq /6 ,57 MM Wirf/;

March 10, 1 925.

E. G.A BussE E'r Al.

LOGKING MEANS FOR ADJUSTABLE BRAKE mums Filed Ju1y s, 1924 2 Sheets-Sheet 2 kns' 1 17a/adam /izihafz' 6 w Mg Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

EDWIN G. BUssE AND ANTHONY4 G. SHIMKUjs, OF CHICAGO, ILLINOIS, lAs'sIGNORs To CHICAGO RAILWAY EQUIPMENT COMPANY, or CHICAGO, ILLINOIS, A CORPORA- TION 0F ILLINOIS.

LOCKING MEANS FOR ADJUSTABLE BRAKE HEADS.

Application filed J'uly 3, 1924. Serial No. 723,898.

To all whom t muy concern.'

Be it known that we, EDWIN Gr. BUssn and ANTHONY G. SHIMKUS, citizens of the United States, residing at Chicago, Illinois, have invented a certain new and useful Im'- provement in Locking Means for Adjustable Brake Heads, of which the following is a specification such as will enable others skilled in the art to which it appertains, tov make and use the same.

rlhis invention relates to new and useful improvements in brake gear construction and the objects of the invention are to provide a safety device for preventing the aocidental disengagament or displacement of the gripping block or pawl of an automatically adjustable brake head, thereby insur-` ing a positive interlock between the brake head and the brake beam under all conditions.

Further Objects of the invention are to provide an inteiengaging member adapted to move into engaging or operative position and hold the brake head against lateral movement on the brake beam, said interengaging member being designed to be locked against movement intodisengaging or inoperative position, thereby eliminating all dan-A ger of the brake head becoming displaced in case the 'spring Or'theusual device used for bringing said memberinto engaging posi-V tion is broken or otherwise disabled.

With these and othervobjects in view, our invention consistsV i-n certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which-` Figure 1 is a verticalcro'ss section through the brake head and parts associated there-l with.

Figure 2 is a front elevational view of the brake head, partly in cross'sect'ion, to more clearly illustrate the method lof locking the gripping member. Y

Figure 3 is a fragmental sectional view of the brakevhea'd showing a modiied formof locking the gripping member in posit-ion.

Figure 4 is a sectional view taken on-l line 4C-4 of Figure 3. v

Figure 5 is a vertical cross section through another form of a brake head and showing a modilied form of the safety memb,er.

Figure 6 is, an elevational; view of the sleeve which forms a part of the brake bearn f and the brake head which carries said block. This block has a corrugated or serrated face which engages the serrated;'pe1ipheral face o r portions of said 4sleeve andV normally serves to maintain ,the brake head in its acljuisted position and permits rotating adjust? ed movement of said brake head relative to the brake beamv but prevents lateral move.- mentor displacementv of said brakehead.

[n case vof breakage of the spring projecting said blockinto engagement with a sleeve or of any' other device'used for this purpose, said block is4 rendered'inoperative and al-l lows the brake head -to move into a disengaged position, thereby disabling the brake gear of the car.

It is'the purpose of the present invention toV provide a safetv lockmember acting directly upon suchfa blockfor maintaininzP the same inoperative or interengaging'position independently of itsgimpelling or projecting device, thereby lock-'ing said brake head against lateralmovement-on'the brake beam.

Referring by numerals tothe accompanying drawings,'l0 designates theco'mpression member of atrussed brake beam and ll'tlle tensiolim'ember thereof,` lQ'is ay sleeve fixed to each end of the brake beam, said sleeve being provided with serrated or corrugated depressed portions 12a and annular flanges or shoulders 12b.- A brake heady 14 is journaled on said sleeve by having a circular housing or socket member 14a which is formed integralgwithsaid brake'head rotatably arranged on Vthe flanged portions, 12b of concave serrated face 16 which is designed to engage the serrated portions 12a of sleeve 12 and yieldingly maintain said brake head in its adjusted position.

A coiled spring 17 is arranged in the lower portion of housing 14h and has its upper end bearing against the underside of block 15 and projects the block in the depressed portion of sleeve 12, thereby preventing lateral movement of the brake relative to said sleeve. The serrated face 16 of block 15 is held in yielding engagement with the serrated portion 12a by spring 17 and allows rotative movement of the brake head relative to the brake beam for the purpose of maintaining the brake shoe in proper alignment with the wheel.

A bolt 18 has its head seated in a recess in block 15 and the lower threaded end of said bolt extends outwardly through the lower wall of housing 14" and receives a nut 19, whereby by turning said nut in the operative position,

proper direction, block 15 may be retracted from its operative position to clear the -llanged portions 12b and allow the insertion or removal of the brake head from the beam.

Heretofore no means were provided for safe-guarding the block 15 and preventing its disengagement from sleeve 12 in case of breakage of spring 17 In order to provide a safe-guard and lock block 15 in its we form said block with a lateral extension 15a in which is formed a `vertically disposed slot 2O for receiving a cotter pin or bolt 21, the ends o f which are seated in the side walls of housing 14". Slot 20 is of sufficient length and is so disposed relative to member 21 that when said block 15 is held against downward movement by member 21, aslight upward \movement of said block is permitted in order that the concave serrated face 16 of'said block may be brought into proper engagement with the serrated portions of sleeve 12'. wWhen it is desired to remove the brake head from the brake beam, it is necessary to first remove member 21 so that block 15 may be retracted from its operative position. Thus it will be seen that the brake head is positively locked on the brake beam member 21 without in any manner interfering with the adjusting rotating movement of said brake head as the block 15 has suficient play in housing 14? to permit the yielding movement thereof during the adjustment of the brakehead, pin 21 acting as a'pivot for Y said block.

Y paratively large ment with avsleeve 26 by a'member 27 which is pivotally mounted at 28 on said brake head and has a concave serrated face 29 for cooperating with the serrated portion 26a of sleeve 26. Member 27 is held in engage-v ment with sleeve 26 by a bolt and nutY connections 30 and 31, respectively,'which engage the opposite endof said member. To prevent the displacement of member 27 in case of breakage of its attaching devices, a cotter pin or bolt 32 is seated in lugs or ears 25a formed integra-l with and projecting from brake head 25 and said cotter pin rests against the outer face of member 27 and holds said member in engagementwith sleeve 26.

ln the forms shown in Figures 7 and 8, a brake head 34 is provided with a housing 34a in which is slidably mounted a block 35 and a housing 34h in which is located the usual spring 36. A spring 37 of a comdiameter is seated in housing 34a and bears against the underside of block 35 which is provided for this purpose with enlarged annular portions 35a. In this form of construction the gripping block is held at all times in yielding engagement with the sleeve and the auxiliary spring 37 servesV as a safety member and will continue to vmaintain said block in engagement with the sleeve in case spring 36 should break,

1. In a brake gear construction, the combination of a brake beam part, a brake head journaled thereon, a gripping block carried by said brake'head for effecting automatically adjustable interengagement between said brake beam part and said brake head, means for bringing said gripping block into its operative position, and a safety member seated in said brake head and maintaining said block in its operative position independently of said means. l

2. In a brake gear construction, the coinbination of a brake beam part, having a circumferentially disposed groove, a brake head journaled onV said brake beam part, a gripping block carried by said brake head, a device in said brake head for engaging said block and forcing it into position in said groove, thereby interlocking said brake head and said brake beam part, and a safety lock member seated in said brake head and engaging said block for preventing the displacement of said block. Y

3. The combination of a brake beam part, a brake head journaled thereon, a springpressed gripping block yieldingly interengaging said brake beampart and said brake head, and a safety lock member carried by said brake head and engaging said block for permitting movement thereof in one direction and locking it against movement in the opposite or inoperative direction. I Y 4. The combination (of a brake beam, a

sleeve fixed to one endv thereof, a brake head journaled thereon, a block in said brake head for operatively engaging said sleeve, a spring in said brake head and engaging said block for forcing the latter into engagement With said sleeve, and a safety lock member carried by said brake head and engaging said block for arresting the movement thereof in a direction avvay from said sleeve.

5. The combination of a brake beam, a sleeve carried by one end theieof and having a depressed peripheral portion and laterally projecting annular flanges, a brake head rotatably arranged thereon, a gripping block mounted in said brake head and projecting inwardly into said depressed portion of said sleeve for preventing the lateral movement of the brake head, a device for maintaining said block in its operative position, and a safety lock member removably mounted in said brake head for locking said block against displacement.

6. The combination of a brake beam, a sleeve fixed to one end thereof, a brake head journaled on said sleeve, a block Carried by said brake head, means for impelling said block in operative engagement With said sleeve, and a safety member detachably seated in said brake head and engaging said block for holding the latter in operative engagement with said sleeve independently of said means.

7. A. brake head having a journal opening adapted to rotatively receive a brake beam part, a gripping paivl carried by said brake head for engaging said beam part and locking the brake head thereon, and an auxiliary locking member in said brake head and en-A gaging and locking said gripping pawl'in operative position.

8. A brake head having a journal housing adapted to rotatively receive a. brake beam part, a gripping paWl carried by said brake head and adapted to engage said brake beam part to look said brake head against displacement, and a locking member carried by said bra-ke head and engaging said gripping pawl and locking it in its engaged position.

9. In a brake head construction, a brake head having a journal opening, a gripping pawl carried by said brake head and adapted to extend into said opening for locking said brake head in operative position, and an auxiliary locking member carried by said brake head and engaging said paivl and holding it against movement into inoperative position. f

10. In a brake head construction, a brake head, a gripping pavvl carried by said brake head and adapted to hold the latter in operative position, and an auxiliary locking inember seated in said brake head and bearing against said gripping paWl for locking it in intei'engaging position.

In testimony whereof We hereunto aiiix our signatures this 26th day of June, 1924i.

EDWIN G. BUSSE. ANTHONY G. SHIMKUS. 

